treatment of back pain. 31 cases were linked to a national tennessee clinic and that's where 70-year-old carol whitten was a patient. >> i was miserable. it wasn't my back and my leg. it was just sharp pains. my head was just hurt. >> the medication made by a pharmacy in massachusetts has since been recalled. >>> with three weeks left until election day and the next presidential debate scheduled for tuesday, the candidates continue to chip away in battleground states. president obama is in virginia while mitt romney is courting votes in ohio. ken molestina reports on the latest from the campaign trail. >> reporter: the romney ticket hit the ground hard in ohio. v.p. candidate paul ryan spent the day chumming it up with supporters at a tailgate. while mitt romney led another rally in what is being described as a must-win state. >> i'm counting on you. let's make it happen. >> reporter: governor romney went before scores of his supporters and criticized president obama saying he wasn't cracking down on unfair trade practices by china negatively affecting the american job market. >> i want to mak